[Simh] Unichannel paper

2015-04-27 Thread Bob Supnik
Normally I'd publish this on the SimH web site, but I'm still locked out (paging Tim Shoppa!), so I'm circulating it here for comments. /Bob The Unichannel.doc Description: MS-Word document ___ Simh mailing list Simh@trailing-edge.com http://mailman

Re: [Simh] Unichannel

2015-04-24 Thread Paul Hardy 2
In an earlier message I said: "..., I did use one of these XVM-15 hybrids in the late 1970s. A ‘standard’ PDP-15 was the host for my first paid software work when I joined Laser-Scan as a programmer in 1975, and I wrote some diagnostics for Sweepnik (a nuclear physics image scanner). Laser-Scan

Re: [Simh] Unichannel

2015-04-23 Thread Richard Cornwell
When I used a XVM 15 back in Syracuse, I was told that there were only about 15 (or some other small number) made. We did not use the 11 for much other then as a fancy print spooler. This was in the around '82. Rich > As preparation for an eventual implementation, I'm writing a paper on > the w

[Simh] Unichannel

2015-04-23 Thread Bob Supnik
As preparation for an eventual implementation, I'm writing a paper on the workings of the UC15, as determined from the schematics. I've answered the technical questions, but I'm left with a business question: was it a commercial success? The online census of 18b systems dates from '72, before t